Q.1
When two solutions of the different concentration are separated by the semi permeable membrane then the solvent flows from low to higher concentration is called osmosis.
  • a) True
  • b) False
Q.2
Which of the following method is not the method of desalination?
  • a) Reverse osmosis
  • b) Multi flash distillation
  • c) Electro dialysis
  • d) Smelting
Q.3
The natural tendency of the water can be reversed by applying ________ to the salty water part.
  • a) Low pressure
  • b) High pressure
  • c) Low temperature
  • d) High temperature
Q.4
In reverse osmosis, the water flows from __________ concentration to ___________ concentration.
  • a) Low, high
  • b) High, low
  • c) High, moderate
  • d) Moderate, low
Q.5
The semi permeable membranes used in the reverse osmosis is _________
  • a) Cellulose
  • b) Glucose
  • c) Cellulose acetate
  • d) Glucose acetate
Q.6
By ultra filtration aldrin can be removed by _________
  • a) 100%
  • b) 99%
  • c) 98%
  • d) 97%
Q.7
__________ co polymer can remove the chlorinated pesticides.
  • a) Styrene di vinyl benzene
  • b) Styrene
  • c) Benzoyl peroxide
  • d) Phenol
Q.8
In reverse osmosis, the membrane pores are smaller in size about ___________
  • a) 0.04 to 600nm
  • b) 0.08 to 500nm
  • c) 0.1 to 600nm
  • d) 0.2 to 500nm
Q.9
COD values are always _________ BOD.
  • a) Less than
  • b) Higher than
  • c) Equal
  • d) Nearly equal
Q.10
COD can be determined in ___________
  • a) 1 Hour
  • b) 2 Hours
  • c) 3 Hours
  • d) 4 Hours
Q.11
Increase in the BOD value in the water indicates ___________
  • a) Decrease in pollution
  • b) Increase in pollution
  • c) Pollution is independent of BOD
  • d) Slight decrease in the BOD
Q.12
The organic matter have the limit in water that is about __________
  • a) 0.2 to 1
  • b) 0.5 to 1
  • c) 1 to 2
  • d) 2 to 4
Q.13
In sewage the waste is about ___________
  • a) 0.01
  • b) 0.02
  • c) 0.03
  • d) 0.05
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